Planning an ADU in Redmond or Sunriver? What to Know About Costs and Design in 2026

Did you know accessory dwelling units (ADUs) date back to the Great Depression? In the 1920s and 1930s, families built small backyard homes as affordable housing solutions. Their popularity resurfaced in the 1980s and 1990s due to housing shortages, and today, ADUs are more desirable than ever. Modern ADU construction in Redmond, OR, isn’t just about extra shelter—it’s about adding value, comfort, and long-term income potential to your property.

For homeowners with ample land, ADUs create flexible opportunities. They can serve as rental units, private offices, guest retreats, art or music studios, or even safe play spaces for children. Many property owners also work with experienced guest house builders to design stylish, functional spaces that complement their primary residence while enhancing overall curb appeal.

How Much Does an ADU Cost?

The cost of building an ADU depends on size, design complexity, materials, and site conditions. On average, projects may range from $200,000 to $400,000. However, these figures vary based on customization and construction choices. Strategic planning, smart material selection, and working with reputable contractors can help control expenses without compromising quality.

Steps to Planning a Successful ADU

1. Evaluate Your Property
Before starting ADU construction in Redmond, OR, assess your property carefully. Zoning laws, lot size, and local building codes determine whether your land qualifies. A proper site evaluation may include soil testing and inspections to ensure the ground conditions can support the structure safely.

2. Work With a Professional Architect
Even if you have construction knowledge, partnering with an architect is essential. They help refine your vision, ensure code compliance, and design a layout that maximizes space and functionality. Professional guidance prevents costly mistakes and streamlines the approval process.

3. Submit Plans for Approval
Your ADU plans must be reviewed by the local Department of Building and Safety. While this step may take time, it ensures your design meets all zoning and safety standards. Once approved, you can secure permits and begin construction with confidence.

4. Compare Contractors and Suppliers
Gather quotes from multiple contractors and suppliers before committing. Comparing options allows you to evaluate experience, pricing, timelines, and reputation. Choosing skilled guest house builders ensures your ADU is constructed efficiently and built to last.

5. Finalize a Clear Construction Timeline
Once you hire your builder, establish a detailed project timeline. Clear communication about milestones, materials, and expectations keeps the project organized and avoids misunderstandings. Regular updates throughout the build help ensure everything stays on schedule.

Building an ADU is more than adding square footage—it’s an investment in your property’s future. Whether you’re creating a rental unit for passive income or a private retreat for loved ones, careful planning and expert craftsmanship make all the difference.Ready to bring your vision to life? Start your ADU construction in Redmond, OR, with the trusted team at Almog Construction. Call 541-508-6104 or email info@almogconstruction.com today to schedule a consultation and begin designing your ideal space.

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